在使用的過程中覺得挺好的,建議看一下關於隊列的原理.
#shmilyzxt/yii2-queue#簡單解釋:
我用的yii2進階版,我們從設定開始看程式碼,這裡我用的是mysql佇列,首先設定檔,我把queue設定項目寫在根目錄common\config\main-local.php下的components陣列下,更改一下資料庫設定.複製composer安裝後複製vendor\shmilyzxt\yii2-queue\jobs\jobs.sqlvendor\shmilyzxt\yii2-queue\failed\failed.sql
#2個sql檔案到資料庫中建立佇列資料表和執行任務失敗時的資料表.
#推送任務開始語法:\Yii::$app-> ;queue->pushOn(new SendMial(),['email'=>'49783121@qq.com','title'=>'test','content'=>'email test'],' email'); 我們到vendor\shmilyzxt\queue\queues\DatabaseQueue.php去看看程式碼,pushOn()方法寫在了DatabaseQueue類的父類vendor\shmilyzxt\queue\base\Queue.php中:
//入队列public function pushOn($job, $data = '', $queue = null)
{ //canPush 检查队列是否已达最大任务量
if ($this->canPush()) {
//beforePush 入队列前的事件
$this->trigger(self::EVENT_BEFORE_PUSH);
//入队列
$ret = $this->push($job, $data, $queue);
//afterPush 入队列后的事件
$this->trigger(self::EVENT_AFTER_PUSH);
return $ret;
} else { throw new \Exception("max jobs number exceed! the max jobs number is {$this->maxJob}");
}
}/**
* 启用一个队列后台监听任务
* @param Queue $queue
* @param string $queueName 监听队列的名称(在pushon的时候把任务推送到哪个队列，则需要监听相应的队列才能获取任务)
* @param int $attempt 队列任务失败尝试次数，0为不限制 * @param int $memory 允许使用的最大内存
* @param int $sleep 每次检测的时间间隔
*/
public static function listen(Queue $queue, $queueName = 'default', $attempt = 10, $memory = 512, $sleep = 3, $delay = 0){
while (true){
try{
//DatabaseQueue从数据库队列取出一个可用任务(实例),并且更新任务
$job = $queue->pop($queueName);
}catch (\Exception $e){
throw $e;
continue;
}
if($job instanceof Job){
//判断执行错误的次数是否大于传入的执行次数
if($attempt > 0 && $job->getAttempts() > $attempt){
$job->failed();
}else{
try{
//throw new \Exception("test failed");
$job->execute();
}catch (\Exception $e){
//执行失败,判断是否被删除,重新入队
if (! $job->isDeleted()) {
$job->release($delay);
}
}
}
}else{
self::sleep($sleep);
}
if (self::memoryExceeded($memory)) {
self::stop();
}
}
} //取出一个任务
public function pop($queue = null)
{ $queue = $this->getQueue($queue);
if (!is_null($this->expire)) { //$this->releaseJobsThatHaveBeenReservedTooLong($queue);
} $tran = $this->connector->beginTransaction();
//判断是否有一个可用的任务需要执行
if ($job = $this->getNextAvailableJob($queue)) { $this->markJobAsReserved($job->id);
$tran->commit();
$config = array_merge($this->jobEvent, [
'class' => 'shmilyzxt\queue\jobs\DatabaseJob',
'queue' => $queue,
'job' => $job,
'queueInstance' => $this,
]);
return \Yii::createObject($config);
} $tran->commit();
return false;
}/**
* 执行任务
*/
public function execute(){
//beforeExecute 执行任务之前的一个事件 在JobEvent中并没有什么可执行的代码
$this->trigger(self::EVENT_BEFORE_EXECUTE, new JobEvent(["job" => $this, 'payload' => $this->getPayload()]));
$this->resolveAndFire();//真正执行的任务的方法
} /** * 真正任务执行方法（调用hander的handle方法） * @param array $payload * @return void */
protected function resolveAndFire()
{ $payload = $this->getPayload();
$payload = unserialize($payload); //反序列化数据
$type = $payload['type'];
$class = $payload['job'];
if ($type == 'closure' && ($closure = (new Serializer())->unserialize($class[1])) instanceof \Closure) {
$this->handler = $this->getHander($class[0]);
$this->handler->closure = $closure;
$this->handler->handle($this, $payload['data']);
} else if ($type == 'classMethod') { $payload['job'][0]->$payload['job'][1]($this, $payload['data']);
} else if ($type == 'staticMethod') { $payload['job'][0]::$payload['job'][1]($this, $payload['data']);
} else {//执行的`SendMail`类的`handle($job,$data)`方法
$this->handler = $this->getHander($class);
$this->handler->handle($this, $payload['data']);
} //执行完任务后删除
if (!$this->isDeletedOrReleased()) { $this->delete();
}
}public function handle($job,$data)
{ if($job->getAttempts() > 3){ $this->failed($job);
} $payload = $job->getPayload();
echo '<pre class="brush:php;toolbar:false">';print_r($payload);
//$payload即任务的数据，你拿到任务数据后就可以执行发邮件了
//TODO 发邮件
}以上是PHPyii2 佇列 shmilyzxt/yii2-queue 簡介的詳細內容。更多資訊請關注PHP中文網其他相關文章！
